Paving construction



p i 20, 1937- -A. c. FISCHER 2,011 149 PAVING CONSTRUCTION Filed Aug 2 1933 dLberZ 6 [4 Patented Apr. 20, 1937 UNITED STATES PATENT OFFlCE Claims.

The invention generally described comprises a paving composed of paving'blocks which may be laid in a uniform layer with the edges of the blocks abutting. The top surfaces of the blocks are adapted to receive tread strips, which preferably project above the top surfaces of the blocks, thereby providing a ribbed or rough tread surface to prevent skidding of vehicles passing thereover. The construction is also adapted for pedestrian traflic, as it also prevents slipping.

The blocks may preferably be of any material such as composition material, heat extruded,

pressed or rolled, wood, steel or the like. The tread strips may also be of any material but are preferably of rubber or rubber composition.

The paving blocks are formed from plastic material, which may be extruded into form, with the top surfaces provided with means, such as recesses, in which the tread strips may thereafter be inserted.

For a better understanding of the invention reference may be made to the accompanying drawing, in which Fig. l is a perspective view of a paving section embodying the present invention;

Fig. 2 is a perspective view of one of the paving blocks provided with recesses adapted to receive tread strips;

Fig. 3 is a perspective view of a tread strip 0 which is adapted to be inserted in the recesses of the paving block illustrated in Fig. 2; and

Figs. 4, 5, and 6 are cross-sectional views of modified forms of tread strips engaged in the paving block.

Referring specifically to thedrawing, numeral I designates generally a paving layer which may be applied upon any sub-structure, such as the ground or a concrete surface which has been prepared to receive the paving layer. The pav- 50 ing layer is composed of a series of blocks 2 which may preferably be made from a plastic composition, such as composition binders, fibre and the like, these materials being mixed together in a warm plasticcondition and then ex- .55 truded into form. The top surfaces of these blocks are provided with any number of recesses 3, which may be of any suitable form, in order that tread strips 4 may be positively secured i thereto.

In the modification in Fig. 2 the recesses are of circular form, and the embedded portion 5 of the tread strip is of a corresponding contour in order to snugly fit therein. a

The blocks may be laid side to side in abutting relation, and with the ends flush to provide a paving structure of uniform width. If a wider paving layer is desired, other blocks may be laid in end to end relation. If this be done, it is preferable to have the blocks laid in staggered relation or with broken joints.

The tread strips are preferably of a rubber composition and may also have included therein a proportion of granular material, .in order to provide a frictional surface. If a large proportion of granular material is used in the tread strips, said tread strips may be embedded in the blocks 2 with the top surface flush with the top surface of the paving blocks. However, it is preferable to insert the tread strips in a paving block with the top raised and projecting a substantial distance above the top surface of the paving block. This produces a ribbed or corrugated tread surface and prevents skidding of vehicles over the pavement.

The modification in Fig. 4 is substantially the same as that illustrated in Fig. 1, paving blocks 2 being provided with a circular recess 3. The tread strip 6 is provided with a circular portion I corresponding with the contour of the recess 3 and has a projecting portion 8 extending above the surface of the block 2.

In Fig. 5 the tread strip is provided with a T portion 9, which corresponds with a similarly formed recess l0 within the paving block 2,-with portion ll of the tread strip projecting above the surface of the paving block.

In Fig. 6 the tread strip I2 is provided with a projection ll formed to fit within a groove H to provide a dovetailed connection.

While I have shown the tread strips associated portion of the tread strips with a paving block, which is adapted to be made up as an article of manufacture, and have the tread strips inserted therein at the place of manufacture, it will be understood that the tread strips mayalso be applied directly to a concrete layer, the concrete layer being poured in place, and having grooves formed therein to receive the embedding portions of the tread strips, which may be applied after the concrete has set, or the tread strips may be applied while the concrete is in a soft, plastic condition.

,I have described the above preferred embodiments in detail, but it will be understood that 5 such detailed construction is for the purpose of illustration and not as a limitation of the invention. Various changes may be made in details of construction without departing from the spirit of the invention.

I claim:

1. A paving block having a wear exposed surface provided with a series of recesses, and tread strips containing granular material inserted within the recesses and extending above the surface of the block and projecting laterally of the' recesses at the upper surface of the block.

2. A pavement comprising a tread receiving layer provided with a series of recesses on its upper face, tread material filling the recesses and extending above the tread receiving layer and projecting laterally of the recesses and overlying the top of the tread receiving layers at the upper edges of the recesses thereby preventing the entrance of dirt into a recess upon lateral flexing of the projecting edge of the tread.

3. A pavement comprising a tread receiving layer providrd with a series of recesses on its upper face, tread material filling the recesses and extending above the tread receiving layer and projecting laterally of the recesses and overlying the top of the tread receiving layers at the rupper edges of the whereby the distance between adjacent treads is substantially less than the distance between adjacent as said tread material containing frictional material for inhibiting slipping across the pavement.

4. A pavement comprising a tread receiving layer provided ,with'a of a on its upper-face, tread materialillling the and extending above the tread receiving lay and projecting laterally of the and overlying the top of the tread receiving layers at the upper edges .of the recesses whereby the distance between adjacent treads is substantially less than the distance between adjacent recesses, said tread material comprising preformed rubber containing members containing granular frictionai material for inhibiting slippage across the pavement. r

5. A pavement comprising a tread receiving layer provided with a series of undercut recesses on its upper face, preformed molded resilient tread material the recesses and projecting above the upper surface of the tread receiving layer, the portion of the tread material above the upper surface of the tread receiving layer projecting laterally of the recesses and resting upon the upper surface of the tread receiving layer, whereby the distance between, adjacent treads is substantially less than the distance between adjacent recesses. p

. ALBERT C. FISCHER. 

